Air compressor



May 13,'1930.

w. c. ALLEN 1,758,211

AIR COMPRESSOR Filed Jan, 2e', 1927 2 sheets-sheer 1 1:7 2z I2 Z V5-34 33 v 215; 3

MAL/AM 6I HLLEN ATre/vfr l May 13, 1930.

w. c. ALLEN AIR COMPRESSOR Filed Jan. 26, 1927 2 Sheets-Sheet 2 MQW-ae,

WML/AM Q ALLEN Patented May 13, 1930 WILLIAMC. ALLEN, on COMPTON, eALiFoRNIn ns'sreivonin iunslvnnssreniyrniv'rs, Y

., .or Los .AnenLEs,cALIronN1A 4ilcanno-v T0 TEE SHARQE MANUFACTURING`-AC0 k:E Mlrron or DELAWARE l *i This. invention relates v to ai'r` Y compressors, and particularly to the `piston typei i f pressed to closed position; and opened in ac` cordanc'e'with thefeonditions of i'iuid pressure existing in the cylinder "controlledthereby. The efficiency of suchl compressorsy e depends somewhat upon the structureo'f these valves,

t the optimum condition beingone in which the i ly occur when the compressor n i A Y purposes as paint spraying." Under such cirvalves openrapidly toperniit a fast flow of fluid into and out ofthe cylinder. openings areV also` essential jt'o prevent wire drawing` aswellas clogging, which inay'eascumstances paint particles (which Vexhibit tenacious tendencies) may-stick to the intake openings, and'iffthese openings are small, may be retained therein. and interfere with the effi# cient operation of the apparatus. Itis 'one of theobjects of my invention to overcome theseV s disadvantages byproper structure of the valves. Y

Considering the outlet or discharge valves,V

itvha's been common to utilize a valve'closure that ts'r'ather snugly into a valve Vpocket and thatis urged intopl`ace by a spring. `Upon suiiicient pressure being developed in the cyl-k inder, the closure is lifted, andcompressed air t' is allowed toV escape into' a receiving'chamber.

To permit theescape ofy air pastthe'elosure,

, it has been common to provide grooves oi" the like therein. Sucha-structure isv expensive, and with the aid ofniy invention, isobviated, Initsplace I substitute a valve lclosurethat servesalso as a spring `seat andthatcan be simply constructed J from standard material, such as sqnarevorheXagon-rods: v

It is still ,another object of 'my lnventionto provide a compact valve structurefor a multi'- ple cylinder 1device thatv is entirely venclosed f ,except for` a screened inlet opening.,v whereby i vdirt Aor-foreign matter i'spreventedffrolnnd-V ing its way into vthe compressorcylinders.

' i It is still another objectfiny inventier'i'to isused for such Y improve ingeneral,compressorsof this char- A VKtages, andl'has'- other objects whichmay be made more easily apparent from a considera# tion of oneeinbodlment of myin-vention. For this purpose I have shown a; form in the draw ings aceoinpanying and forming Vpart Vof theV present specification. I shall now proceedte"' describe thisy forni in detaihwhi'cli illustrates V the general principlesofmy invention ,but itv isto be understood that-this detailed des'lcrp-A tion is not to be taken in va limiting sense, since the scope of myfi-nvention-is best defined by the appended claims; Y Y

Referring tothe dravv'ingsfV V Y Figure 1 is aside elevation embodying-'my invention;

as seen from arrow 2 in Fig. 1;

Fig. Q'isa-plan view ofthe'head structure, Y

- F ig".` 3 is a similar View but'with @over re;k

moved; exposing the valve parts, the view being takenalong plane 3--3o`f Fig. 1;

"FigQlisl an enlarged sectional View taken I yalongplanelrf-fl of Fig.' 8, but with the cver shown asin place;V Fig.- 5 Y section, of the gearlcasing used in with gmy compressor; and

for thef compressor. y Y

f In I`the presentinstance I show a four' cylf inder structure, including I aV casing 11 that heusesthe usuahoperating parts of the comof a compressor lis" an 'enlarged elevation,- par'tly in connection 1 ,t Fign is adetall section ofthe inlet nozzle presser,- and Vfrom whichh projects a cylinder block 12./` Thisb'lo'ck is shownas having a sef completelyaround the block 12. "Gearing 14 ries of horizontal radiating ns lfextending (Fig.` 5)? is encased at'one side ofthe casing `11 and serves' as atrans'mitter ofiinotn from a shaft 15 that carries Vaiiexible shaft coupling structure 16.

The gearingr-14-'iS-h0used inthe extending 1' poi-'tion `1'? "of casing-'11, ,which has a1 cover 18 clamped over' portion 17 as by'cap screws' 19. The driving shaft 15hsalongbearingf membei*i QOfeastjinteg'ral with OVer 18,* andf Car-V my hand.

WILLIAM GALLENt 

